python 2 and python 3 packages

python 2 and python 3 packages seem to be installed all over the place

/usr/local/lib

• /usr/local/lib/python2.7/dist-packages/
• /usr/local/lib/python2.7/site-packages/
• /usr/local/lib/python3.5/dist-packages/
• /usr/local/lib/python3.5/site-packages/

/usr/lib

• /usr/lib/python2.6/
• /usr/lib/python2.7/
• /usr/lib/python3/
• /usr/lib/python3.5/

.local/lib

• .local/lib/python2.7/dist-packages/
• .local/lib/python2.7/site-packages/
• .local/lib/python3.5/dist-packages/
• .local/lib/python3.5/site-packages/